After this recipe has run for the first time. Open the spreadsheet and insert a new row at the top, above the data IFTTT added.
Enter titles in the cells of that row:
A1 = Date,
A2 = Weight,
A3 = Body Fat %.
You can then insert the chart of your choice into the spreadsheet and IFTTT will automatically update your graph for a visual representation of your results.
You can save the graph to its own sheet, pull that sheet to the front, and IFTTT will update the hidden sheet without you ever having to look at the raw data.